I had some trouble again with my spark.I uploaded factory reset,redownloaded dji 4,after that do I have to connect the aircraft's wifi?I tried but it doesn't accept the code written on spark.

Hi there, thank you for reaching out. Regarding that you can check this video tutorial on how to link the Remote to the Aircraft

DJI Stephen Posted at 2018-9-16 07:12
Hi there, thank you for reaching out. Regarding that you can check this video tutorial on how to link the Remote to the Aircraft https://www.youtube.com/watch?v=GOi9WiS-PF8

It is not the problem to connect,I can do it easily.but can't control it

Try to use the code. it usually works and recognizes it.

H. Arif - 6IX Posted at 2018-9-16 16:53
Try to use the code. it usually works and recognizes it.

what code?

djiuser_SrrIUWy2ZhDK Posted at 2018-9-16 21:57
what code?

the QR code on the box, on the remote, on the drone itself under the battery mount.

Hi,

To me it's not really clear what you're trying to do.
Are you using a remote controller?
Which phone are you using?
Firmware version of remote and aircraft?
What's exactly the problem you're facing?

It is much easier to help you if we have some more detailed info, instead of just "it doesn't work" :-)

Cheers,
Wolferl